TL;DR: The way OpenStack handles the adminPass attribute during
metadata injection is not useful on operating systems without an
/etc/passwd and /etc/shadow. I would like to make the adminPass value
available on a Windows instance, and this is my proposal for how to do
it.

Oh geez, it gets worse. The configuration disk created by OpenStack
is a whole-disk filesystem (no partition map), so Windows thinks it's
all unallocated space...so even with my patches in place I still can't
get at the data.
I can see I'm traveling through largely unexplored territory here.